* [PATCH 2/2] arm64: dts: uDPU: remove i2c-fast-mode
@ 2019-11-16 11:07 Russell King
2019-12-09 14:38 ` Gregory CLEMENT
0 siblings, 1 reply; 2+ messages in thread
From: Russell King @ 2019-11-16 11:07 UTC (permalink / raw)
To: Gregory Clement, Vladimir Vid
Cc: Mark Rutland, Andrew Lunn, Jason Cooper, devicetree, Rob Herring,
linux-arm-kernel, Sebastian Hesselbarth
The I2C bus violates the timing specifications when run in fast mode
on the uDPU, so switch to 100kHz mode.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
index e31813a4f972..2ac1d9ae1e25 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
@@ -119,12 +119,14 @@
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&i2c1_pins>;
+ /delete-property/mrvl,i2c-fast-mode;
};
&i2c1 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&i2c2_pins>;
+ /delete-property/mrvl,i2c-fast-mode;
lm75@48 {
status = "okay";
--
2.20.1
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^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH 2/2] arm64: dts: uDPU: remove i2c-fast-mode
2019-11-16 11:07 [PATCH 2/2] arm64: dts: uDPU: remove i2c-fast-mode Russell King
@ 2019-12-09 14:38 ` Gregory CLEMENT
0 siblings, 0 replies; 2+ messages in thread
From: Gregory CLEMENT @ 2019-12-09 14:38 UTC (permalink / raw)
To: Russell King, Vladimir Vid
Cc: Mark Rutland, Andrew Lunn, Jason Cooper, devicetree, Rob Herring,
linux-arm-kernel, Sebastian Hesselbarth
Russell King <rmk+kernel@armlinux.org.uk> writes:
> The I2C bus violates the timing specifications when run in fast mode
> on the uDPU, so switch to 100kHz mode.
>
> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Applied on mvebu/dt64
Thanks,
Gregory
> ---
> arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> index e31813a4f972..2ac1d9ae1e25 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
> @@ -119,12 +119,14 @@
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&i2c1_pins>;
> + /delete-property/mrvl,i2c-fast-mode;
> };
>
> &i2c1 {
> status = "okay";
> pinctrl-names = "default";
> pinctrl-0 = <&i2c2_pins>;
> + /delete-property/mrvl,i2c-fast-mode;
>
> lm75@48 {
> status = "okay";
> --
> 2.20.1
>
--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com
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linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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2019-12-09 14:38 ` Gregory CLEMENT
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